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31 results about "Pyridine synthesis" patented technology

Catalyst for synthesizing pyridine using microsphere type high-silicon ZSM-5 molecular sieve as carrier and preparation method thereof

The invention provides a pyridine synthesis catalyst which takes microspherical high-silicon ZSM-5 molecular sieve as a carrier and a preparation method thereof. The preparation method adopts hydroxides of silicon source, aluminium source, alkali metal or alkaline earth metal, tetrapropylammonium bromide or tetrapropylammonium hydroxide and water as raw materials for preparing slurry, silicon-aluminum microspheres with the diameter of 30 to 200 um are obtained by spray drying and shaping, then the silicon-aluminum microspheres are arranged in organic amine steam, and the microspherical high-silicon ZSM-5 molecular sieve is obtained by washing, drying and calcination after the hydrothermal synthesis and the crystallization. The microspherical high-silicon ZSM-5 molecular sieve is taken as the carrier, one or more Pb, Sn and Zn elements is / are taken as main agents of active components, VIII family transition elements, IV family transition elements or / and alkaline earth metal elements are taken as auxiliary agents of the active components, wherein, the molar ratio of the total auxiliary agent to the total main agents is 0: 1 to 1: 1, the weight ratio of the active components and the carrier is 0.01 to 0.2; the carrier is impregnated in solution containing active components, and the catalyst of the invention is obtained by drying, calcination and activation, etc. As the synthesis process of the microspherical high-silicon ZSM-5 molecular sieve carrier which is used by the catalyst is shaped, the secondary shaping is unnecessary; at the same time, the catalyst can avoid the impact of a binding agent, thereby having better activity in applications. The yield of pyridine can achieve 77 percent and the total yield of pyridine derivatives can achieve 90 percent under the action of the catalyst. The catalyst of the invention is especially applicable to the fluidized bed catalytic process.
Owner:CHINA CATALYST HLDG CO LTD

Method for treating pyridine wastewater

The invention discloses a method for treating pyridine wastewater, which comprises the following steps: pyridine wastewater, which is discharged from a pyridine extraction tower in an acetaldehyde+formaldehyde+liquid ammonia high-temperature pyridine synthesis technique, is subjected to low-vacuum flash distillation gas stripping, gas-phase absorption, fixed bed adsorption, desorption, distillation and other steps to separate and recover ammonia, pyridine and 3-methylpyridine in the pyridine wastewater, and the colorless water is subjected to biochemical treatment and discharged after reaching the standard. The method solves the problems of discharge of incinerator exhaust NOX, high incineration cost and carbon discharge due to abundant pyridine and derivatives in the wastewater incineration process in the pyridine production technique, effectively recovers the pyridine and derivatives, saves the cost, and lowers the pollution.
Owner:河北美邦工程科技股份有限公司

Synthesis method of 2, 3-dichloro-5-trichloromethylpyridine

The invention discloses a synthesis method of 2, 3-dichloro-5-trichloromethylpyridine, which is characterized in that a microreactor is used as a chlorination reaction channel, the first half of the microreactor channel is used as a primary chlorination channel, and the second half of the microreactor channel is filled with a catalyst B as a secondary chlorination reaction channel. The method comprises the following steps of firstly, fully mixing 2-chloro-5-methylpyridine with a catalyst A in a mixing chamber, then continuously reacting with chlorine through a primary chlorination channel to obtain 2-chloro-5-trichloromethylpyridine, then reacting through a secondary chlorination channel to obtain a crude oil layer of 2, 3-dichloro-5-trichloromethylpyridine, and carrying out alkali washing, dechlorination and rectification on the crude oil layer to obtain the high-concentration 2, 3 -dichloro-5-trichloromethylpyridine with the total yield to be 82-93%. According to the method, the technological process is simple, amplification production can be carried out through parallel connection, the catalyst B can be recycled and reused, the chlorination time is remarkably shortened, the chlorine utilization rate is increased, the post-treatment difficulty of the product is reduced, and the synthesis cost of 2, 3-dichloro-5-trichloromethylpyridine is saved.
Owner:JIANGSU YOUJIA CHEM

Catalyst for synthesizing pyridine using microsphere type high-silicon ZSM-5 molecular sieve as carrier and preparation method thereof

The invention provides a pyridine synthesis catalyst which takes microspherical high-silicon ZSM-5 molecular sieve as a carrier and a preparation method thereof. The preparation method adopts hydroxides of silicon source, aluminium source, alkali metal or alkaline earth metal, tetrapropylammonium bromide or tetrapropylammonium hydroxide and water as raw materials for preparing slurry, silicon-aluminum microspheres with the diameter of 30 to 200 um are obtained by spray drying and shaping, then the silicon-aluminum microspheres are arranged in organic amine steam, and the microspherical high-silicon ZSM-5 molecular sieve is obtained by washing, drying and calcination after the hydrothermal synthesis and the crystallization. The microspherical high-silicon ZSM-5 molecular sieve is taken as the carrier, one or more Pb, Sn and Zn elements is / are taken as main agents of active components, VIII family transition elements, IV family transition elements or / and alkaline earth metal elements are taken as auxiliary agents of the active components, wherein, the molar ratio of the total auxiliary agent to the total main agents is 0: 1 to 1: 1, the weight ratio of the active components and the carrier is 0.01 to 0.2; the carrier is impregnated in solution containing active components, and the catalyst of the invention is obtained by drying, calcination and activation, etc. As the synthesis process of the microspherical high-silicon ZSM-5 molecular sieve carrier which is used by the catalyst is shaped, the secondary shaping is unnecessary; at the same time, the catalyst can avoid the impact of a binding agent, thereby having better activity in applications. The yield of pyridine can achieve 77 percent and the total yield of pyridine derivatives can achieve 90 percent under the actionof the catalyst. The catalyst of the invention is especially applicable to the fluidized bed catalytic process.
Owner:CHINA CATALYST HLDG CO LTD

Tridentate [ONO] tungsten coordination compound and optical application thereof

The invention provides a tridentate [ONO] tungsten coordination compound and optical application thereof, and the tridentate [ONO] tungsten coordination compound is divided into but not limited to three structures, namely a structure I, a structure II and a structure III, the synthesis method of the tridentate tungsten coordination compound mainly comprises the following steps: mixing different equal amounts of tridentate [ONO] phenol imine compounds serving as ligands with dichlorotungsten dioxide and 2.2-3 times of pyridine, and carrying out reflux reaction at 115-135 DEG C for at least 24 hours by taking methylbenzene as a solvent, so as to obtain the tridentate [ONO] tungsten coordination compound. The tridentate [ONO] tungsten coordination compound is synthesized by using different tridentate [ONO] phenol imine compounds as ligands, tungsten dioxide dichloride and pyridine, the ligands are subjected to configuration torsion after optical excitation, and when metal tungsten is added to form a metal-ligand coordination bond, the configuration torsion of the ligands is limited, the energy relaxation is reduced, the ligand red shift is obvious, and the light is enhancedl; the tridentate [ONO] tungsten coordination compound can be used as a light-emitting material; and meanwhile, the synthesized complex has chirality, so that the synthesized complex can be used as a circular polarization luminescent material for practical application.
Owner:晨茵科创(天津)有限公司

Platinum diphosphonate complex as well as synthesis method and application thereof

The invention discloses a diphosphonic acid platinum complex and a preparation method thereof, a non-leaving group of the complex is composed of ammonia and a diphosphonic acid bipyridine ligand, and the diphosphonic acid bipyridine ligand and a platinum center form an eight-membered ring. The synthesis method of the complex comprises synthesis of 2-chloromethylpyridine, synthesis of [1, 3-bis (2-pyridyl) propane-2, 2-diyl] bis (phosphonic acid) tetraethyl ester and synthesis of the diphosphonic acid platinum complex, and the synthesis method is high in synthesis yield, high in implementation feasibility and stable in product. The complex is difficult to chelate with glutathione, so that side effects caused by combination of platinum drugs and glutathione can be greatly reduced, and the complex can be used for overcoming drug resistance of the platinum drugs; the complex has a certain inhibition effect on osteosarcoma cells; the complex can also interact with human serum albumin in a static quenching manner. The research provides a new strategy for solving the drug resistance of the platinum diphosphonate, and good technical progress is achieved.
Owner:NANJING MEDICAL UNIV
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